U.S. patent application number 16/842914 was filed with the patent office on 2021-04-22 for plastic frame, backlight module and display device.
The applicant listed for this patent is Beijing BOE Display Technology Co., Ltd., BOE TECHNOLOGY GROUP CO., LTD.. Invention is credited to Inho PARK, Hanyan SUN, Xiaojian YANG, Minghui ZHANG, Hui ZHENG.
Application Number | 20210116738 16/842914 |
Document ID | / |
Family ID | 1000004795818 |
Filed Date | 2021-04-22 |
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United States Patent
Application |
20210116738 |
Kind Code |
A1 |
ZHENG; Hui ; et al. |
April 22, 2021 |
PLASTIC FRAME, BACKLIGHT MODULE AND DISPLAY DEVICE
Abstract
A plastic frame includes a first frame having a first frame
surface and a first end portion and a second end portion opposite
to each other, and a second frame having a second frame surface, an
end portion of the second frame being connected to the first end
portion of the first frame. The first frame surface and the second
frame surface are located on the same side of the plastic frame. A
first height difference between the first frame surface at a first
end portion of the first frame and the second frame surface is
smaller than a height difference between the first frame surface at
a middle portion of the first frame and the second frame surface.
The first height difference may be, for example, 0.1-0.3 mm.
Inventors: |
ZHENG; Hui; (Beijing,
CN) ; SUN; Hanyan; (Beijing, CN) ; YANG;
Xiaojian; (Beijing, CN) ; ZHANG; Minghui;
(Beijing, CN) ; PARK; Inho; (Beijing, CN) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Beijing BOE Display Technology Co., Ltd.
BOE TECHNOLOGY GROUP CO., LTD. |
Beijing
Beijing |
|
CN
CN |
|
|
Family ID: |
1000004795818 |
Appl. No.: |
16/842914 |
Filed: |
April 8, 2020 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
G02F 1/133317 20210101;
G02F 1/133308 20130101 |
International
Class: |
G02F 1/1333 20060101
G02F001/1333 |
Foreign Application Data
Date |
Code |
Application Number |
Oct 21, 2019 |
CN |
201921773142.6 |
Claims
1. A plastic frame, comprising: a first frame having a first frame
surface, and a first end portion and a second end portion opposite
to each other; and a second frame having a second frame surface, an
end portion of the second frame being connected to the first end
portion of the first frame; wherein the first frame surface and the
second frame surface are located on a same side of the plastic
frame, and a first height difference between the first frame
surface at the first end portion of the first frame and the second
frame surface is smaller than a height difference between the first
frame surface at a middle portion of the first frame and the second
frame surface.
2. The plastic frame according to claim 1, wherein the first height
difference is 0.1-0.3 mm.
3. The plastic frame according to claim 1, further comprising: a
third frame having a third frame surface, an end portion of the
third frame being connected to the second end portion of the first
frame; wherein the third frame surface and the first frame surface
are located on the same side of the plastic frame, and a second
height difference between the first frame surface at the second end
portion of the first frame and the third frame surface is smaller
than a height difference between the first frame surface at the
middle portion of the first frame and the third frame surface.
4. The plastic frame according to claim 3, wherein the second
height difference is 0.1-0.3 mm.
5. The plastic frame of claim 3, wherein the first frame surface
comprises: a middle plane in the middle of the first frame surface;
a first inclined surface connected to the middle plane and
extending to the first end portion; and a second inclined surface
connected to the middle plane and extending to the second end
portion.
6. The plastic frame according to claim 5, wherein: an inclination
angle of the first inclined surface with respect to the middle
plane is 5.degree.-10.degree.; or the inclination angle of the
second inclined surface with respect to the middle plane is
5.degree.-10.degree..
7. The plastic frame of claim 6, wherein: a height of the first
inclined surface at the first end portion is greater than a height
of the second frame surface; or a height of the second inclined
surface at the second end portion is greater than a height of the
third frame surface.
8. The plastic frame according to claim 5, wherein: a length of the
first inclined surface in a longitudinal direction of the first
frame surface is 10-20 mm; or a length of the second inclined
surface in the longitudinal direction of the first frame surface is
10-20 mm.
9. The plastic frame of claim 5, wherein the first inclined surface
is smoothly connected to the middle plane, or the second inclined
surface is smoothly connected to the middle plane.
10. A backlight module, comprising: a plastic frame, comprising: a
first frame having a first frame surface, and a first end portion
and a second end portion opposite to each other; and a second frame
having a second frame surface, an end portion of the second frame
being connected to the first end portion of the first frame;
wherein the first frame surface and the second frame surface are
located on a same side of the plastic frame, and a first height
difference between the first frame surface at the first end portion
of the first frame and the second frame surface is smaller than a
height difference between the first frame surface at a middle
portion of the first frame and the second frame surface.
11. A display device, comprising: a plastic frame, comprising: a
first frame having a first frame surface and a first end portion
and a second end portion opposite to each other; and a second frame
having a second frame surface, an end portion of the second frame
being connected to the first end portion of the first frame;
wherein the first frame surface and the second frame surface are
located on the same side of the plastic frame, and a first height
difference between the first frame surface at the first end portion
of the first frame and the second frame surface is smaller than a
height difference between the first frame surface at a middle
portion of the first frame and the second frame surface; and a
display panel supported on the first frame surface and the second
frame surface, wherein a side of the display panel has a bonding
part for bonding and connecting to a circuit board, and at least a
part of the bonding part is supported on the first frame
surface.
12. The display device according to claim 11, further comprising a
buffer disposed between the plastic frame and the display panel, an
orthographic projection of the buffer on the display panel being
not overlapped with the bonding part.
13. The display device according to claim 11, wherein the first
height difference is 0.1-0.3 mm.
14. The display device according to claim 11, further comprising: a
third frame having a third frame surface, an end portion of the
third frame being connected to the second end portion of the first
frame; wherein the third frame surface and the first frame surface
are located on the same side of the display device, and a second
height difference between the first frame surface at the second end
portion of the first frame and the third frame surface is smaller
than a height difference between the first frame surface at a
middle portion of the first frame and the third frame surface.
15. The display device according to claim 14, wherein the second
height difference is 0.1-0.3 mm.
16. The display device according to claim 14, wherein the first
frame surface comprises: a middle plane in the middle of the first
frame surface; a first inclined surface connected to the middle
plane and extending to the first end portion; and a second inclined
surface connected to the middle plane and extending to the second
end portion.
17. The display device according to claim 16, wherein: an
inclination angle of the first inclined surface with respect to the
middle plane is 5.degree.-10.degree.; or an inclination angle of
the second inclined surface with respect to the middle plane is
5.degree.-10.degree..
18. The display device of claim 17, wherein: a height of the first
inclined surface at the first end portion is greater than a height
of the second frame surface; or a height of the second inclined
surface at the second end portion is greater than a height of the
third frame surface.
19. The display device according to claim 16, wherein: a length of
the first inclined surface in a longitudinal direction of the first
frame surface is 10-20 mm; or a length of the second inclined
surface in the longitudinal direction of the first frame surface is
10-20 mm.
Description
CROSS-REFERENCE TO RELATED APPLICATION
[0001] This application claims the benefit of and priority to
Chinese Patent Application No. 201921773142.6, filed on Oct. 21,
2019, the contents of which being incorporated by reference in
their entirety herein.
TECHNICAL FIELD
[0002] This disclosure relates to the technical field of liquid
crystal display devices and, in particular, to a plastic frame, a
backlight module, and a display device.
BACKGROUND
[0003] When liquid crystal modules are designed, generally, the
liquid crystal display panel includes a color film substrate and an
array substrate which are attached to each other. For three-sided
edgeless liquid crystal modules, presently, chip-on-flex (COF),
generally referred to as a flip-chip film, or chip-on-glass (COG),
i.e., a chip directly bonded to a glass substrate, technology is
generally adopted to bond a circuit board (bonding printed circuit
board (PCB)) at a bonding part (i.e., a pad part) of the array
substrate.
SUMMARY
[0004] According to one aspect of the present disclosure, a plastic
frame includes:
[0005] a first frame having a first frame surface and a first end
portion and a second end portion opposite to each other; and
[0006] a second frame having a second frame surface, an end portion
of the second frame being connected to the first end portion of the
first frame;
[0007] wherein the first frame surface and the second frame surface
are located on the same side of the plastic frame; and a first
height difference between the first frame surface at a first end
portion of the first frame and the second frame surface is smaller
than a height difference between the first frame surface at a
middle portion of the first frame and the second frame surface.
[0008] wherein the first height difference is 0.1-0.3 mm.
[0009] According to one embodiment of the present disclosure, the
plastic frame further includes:
[0010] a third frame having a third frame surface, an end portion
of the third frame being connected to the second end portion of the
first frame;
[0011] wherein the third frame surface and the first frame surface
are located on the same side of the plastic frame, and a second
height difference between the first frame surface at a second end
portion of the first frame and the third frame surface is smaller
than a height difference between the first frame surface at the
middle portion of the first frame and the third frame surface.
[0012] According to one embodiment of the present disclosure,
wherein the second height difference is 0.1-0.3 mm.
[0013] According to one embodiment of the present disclosure,
wherein the first frame surface includes:
[0014] a middle plane located in the middle of the first frame
surface;
[0015] a first inclined surface connected to the middle plane and
extending to the first end portion; and
[0016] a second inclined surface connected to the middle plane and
extending to the second end portion.
[0017] According to one embodiment of the present disclosure,
wherein an inclination angle of the first inclined surface with
respect to the middle plane is 5.degree.-10.degree.; or/and the
inclination angle of the second inclined surface with respect to
the middle plane is 5.degree.-10.degree..
[0018] According to one embodiment of the present disclosure,
wherein a height of the first inclined surface at the first end
portion is greater than a height of the second frame surface;
or/and a height of the second inclined surface at the second end
portion is greater than a height of the third frame surface.
[0019] According to one embodiment of the present disclosure,
wherein a length of the first inclined surface in a longitudinal
direction of the first frame surface is 10-20 mm; or/and a length
of the second inclined surface in the longitudinal direction of the
first frame surface is 10-20 mm.
[0020] According to one embodiment of the present disclosure,
wherein the first inclined surface is smoothly connected to the
middle plane, and/or the second inclined surface is smoothly
connected to the middle plane.
[0021] According to the other aspect of the present disclosure, a
backlight module includes the plastic frame according to the
present disclosure.
[0022] According to a further aspect of the present disclosure, a
display device includes:
[0023] a plastic frame, including:
[0024] a first frame having a first frame surface and a first end
portion and a second end portion opposite to each other; and
[0025] a second frame having a second frame surface, an end portion
of the second frame being connected to the first end portion of the
first frame;
[0026] wherein the first frame surface and the second frame surface
are located on the same side of the plastic frame, and a first
height difference between the first frame surface at a first end
portion of the first frame and the second frame surface is smaller
than a height difference between the first frame surface at a
middle portion of the first frame and the second frame surface;
and
[0027] a display panel supported on the first frame surface and the
second frame surface, wherein a side of the display panel has a
bonding part for bonding and connecting to a circuit board, and at
least a part of the bonding part is supported on the first frame
surface.
BRIEF DESCRIPTION OF THE DRAWINGS
[0028] The accompanying drawings, which are included to provide a
further understanding of the technical solution of the present
disclosure and constitute a part of the specification, together
with the embodiments of the present disclosure serve to explain the
technical solution of the present disclosure, without limiting to
the technical solution of the present disclosure.
[0029] FIG. 1 is a schematic structural view of a display device of
the related art;
[0030] FIG. 2 is a sectional view taken along a line A-A in FIG.
1;
[0031] FIG. 3A is a partial schematic structural view of a plastic
frame according to an embodiment of the present disclosure;
[0032] FIG. 3B is an overall schematic structural view of a plastic
frame according to an embodiment of the present disclosure;
[0033] FIG. 4 is a partial schematic structural view of a first
frame of the plastic frame according to an embodiment of the
present disclosure;
[0034] FIG. 5 is an overall schematic structural view of a first
frame of the plastic frame according to an embodiment of the
present disclosure;
[0035] FIG. 6 is a schematic structural view of a display device
according to an embodiment of the present disclosure; and
[0036] FIG. 7 is a schematic structural view of a male mold and a
female mold during injection molding of the plastic frame according
to an embodiment of the present disclosure.
DETAILED DESCRIPTION
[0037] The technical solution of the present disclosure will be
further described below with reference to the accompanying drawings
and through specific embodiments. It is appreciated that the
specific embodiments as described herein are merely used to explain
the present disclosure rather than limiting the present
disclosure.
[0038] With reference to FIG. 1 and FIG. 2, FIG. 1 is a schematic
structural view of a display device of the related art, showing a
corner breakage position which easily occurs at a side where a
bonding part is located. FIG. 2 is a sectional view taken along a
line A-A in FIG. 1.
[0039] As shown in FIGS. 1 and 2, the display device mainly
includes a plastic frame, a display panel 7 supported on a front of
the plastic frame, and a backlight module 20 provided on a back of
the plastic frame. One side of the display panel 7 is provided with
a bonding part 8 (i.e., a pad part) for bonding with a circuit
board 100. The bonding part 8 is a single-layer glass substrate
structure and has a thickness thinner than other positions of the
display panel, as such, corner breakage easily occurs on the
display panel during assembly or application of the display
device.
[0040] The plastic frame a height difference d1 (see FIG. 2)
between an end portion surface thereof below the bonding part 8 and
a surface thereof below the display panel 7. That is, the plastic
frame has a larger broken difference structure (i.e., an uneven
structure).
[0041] According to analysis of force being applied to the corner
breakage position 9 of the display panel 7, it is found that when
the liquid crystal module in the display device is assembled, left
and right corner positions on a side of an external circuit board
11 (PCB, i.e., the circuit board) of the display panel 7 need to be
pasted with a conductive cloth. During the pasting process, a force
will be applied to the display panel 7. If a surface supporting the
display panel 7 is uneven, stress concentration will easily occur
to cause corner breakage. As the corner is uneven, corner breakage
tends to occur due to stress concentration. A breakage position 9
is referenced in FIGS. 1 and 2. As shown in FIG. 2, in the actual
assembly process, the plastic frame 10 of the backlight module 20
provides support for the display panel 7. When the display panel 7
is subjected to external pressure F, due to the segment difference
structure on the plastic frame 10, fragmentation will easily occur.
As compared with the middle portion, the corner position stress
concentration is more prone to occur, thereby causing corner
breakage.
[0042] Now, with reference to FIG. 3A, FIG. 3B, and FIG. 4, FIG. 3A
is a partial schematic structural view of a plastic frame according
to an embodiment of the present disclosure. FIG. 3B is an overall
schematic structural view of a plastic frame according to an
embodiment of the present disclosure. FIG. 4 is a sectional view
taken along a line A-A in FIG. 3A.
[0043] The plastic frame of an embodiment of the present disclosure
has a rectangular frame structure, and includes a first frame 1, a
second frame 2, a fourth frame 4, and a third frame 3, which are
sequentially connected end to end.
[0044] The first frame 1 has a first frame surface 11 and first and
second end portions 12 and 13 opposite to each other. The second
frame 2 has a second frame surface 21, and an end portion of the
second frame 2 is connected to the first end portion 12 of the
first frame 1. The third frame 3 has a third frame surface 31, and
an end portion of the third frame 3 is connected to the second end
portion 13 of the first frame 1. The fourth frame 4 has a fourth
frame surface 41 connected between the second frame 2 and the third
frame 3.
[0045] The first frame surface 11, the second frame surface 21, the
third frame surface 31, and the fourth frame surface 41 are located
on the same side of the plastic frame, for example, on an upper
surface of the plastic frame. A first height difference d2 (see
FIG. 6) between the first frame surface 11 at the first end portion
12 of the first frame 1 and the second frame surface 21 is smaller
than a height difference between the first frame surface 11 at the
middle portion of the first frame 1 and the second frame surface 21
(the height difference may referred to d1 in FIG. 2). In this
embodiment, the first height difference d2 is 0.2 mm. In some
embodiments, the first height difference d2 may be in a range of
0.1-0.3 mm, and in other embodiments, the first height difference
d2 may also be 0.
[0046] Similarly, a second height difference between the first
frame surface 11 at the second end portion 13 of the first frame 1
and the third frame surface 112 is smaller than a height difference
between the first frame surface 11 at the middle portion of the
first frame 1 and the third frame surface 112. In this embodiment,
the second height difference is 0.2 mm. In other embodiments, the
second height difference is in a range of 0.1-0.3 mm, or may be
0.
[0047] Formation of the first height difference d2 and the second
height difference will be described below with the first frame
surface 11, as an example.
[0048] The first frame surface 11 includes a middle plane 111
located in the middle of the first frame surface 11, and a first
inclined surface 112 and a second inclined surface 113 smoothly
connect to two end portions of the middle plane 111. The first
inclined surface 112 extends from the middle plane 111 to the first
end portion 12, and the second inclined surface 113 extends from
the middle plane 111 to the second end portion 13.
[0049] An inclination angle .alpha. of the first inclined surface
112 with respect to the middle plane 111 is 6.degree.. In some
embodiments, the inclination angle .alpha. is feasible in the range
of 5.degree.-10.degree.. An inclination angle .beta. of the second
inclined surface 113 with respect to the middle plane 111 is
6.degree.. In other embodiments, the inclination angle .beta. is
feasible in the range of 5.degree.-10.degree.. The inclination
angle .alpha. and the inclination angle .beta. may be the same or
different.
[0050] A height of the first inclined surface 112 at the first end
portion 12 is greater than a height of the second frame surface 21,
that is, the first inclined surface 112 at the lowest end is still
higher than the second frame surface 21. In some embodiments, the
first inclined surface 112 and the second frame surface 21 also may
be flush. A height of the second inclined surface 113 at the second
end portion 13 is greater than a height of the third frame surface
112, that is, the second inclined surface 113 at the lowest end is
still higher than the third frame surface 112. In some embodiments,
the second inclined surface 113 and the third frame surface 112 are
flush.
[0051] A length L1 of the first inclined surface 112 in a
longitudinal direction D of the first frame surface 11, that is, a
distance from a starting position P1 where the first inclined
surface 112 is connected to the middle plane 111 to the first end
portion 12 of the first frame surface 11 is 15 mm, and the length
L1 may be feasible in the range of 10-20 mm. A length L2 of the
second inclined surface 113 in the longitudinal direction D of the
first frame surface 11, that is, a distance from the starting
position P2 where the second inclined surface 113 is connected to
the middle plane 111 to the second end portion 13 of the first
frame surface 11 is 15 mm, and the length L1 may be feasible in the
range of 10-20 mm. The length L1 of the first inclined surface 112
and the length L2 of the second inclined surface 113 may be same or
different.
[0052] A specific way of forming an inclined surface on portions of
the first frame surface 11 close to the first end portion 12 and
close to the second end portion 13 respectively, and thereby
forming smaller first height difference and second height
difference is described above. However, the present disclosure is
not limited to the above-described specific embodiments. For
example, in some embodiments, a plurality of stage surfaces may be
formed on the portions of the first frame surface 11 close to the
first end portion 12 and close to the second end portion 13,
respectively, and a smaller first height difference and second
height difference may also be formed.
[0053] A backlight module 20 provided by the present disclosure
includes the plastic frame 10 of the present disclosure.
[0054] As shown in FIG. 6, an embodiment of the present disclosure
provides a display device including a display panel 7 and a
backlight module 20 disposed on a back side of the display panel 7.
The display panel 7 has a bonding part 8 for bonding and connecting
to a circuit board 100. The backlight module 20 includes a plastic
frame 10 supported on a peripheral area on the back side of the
display panel 7. The plastic frame 10 is provided with a first
frame surface 11 facing the display panel 7 and a second frame
surface 21 adjacent to the first frame surface 11. The bonding part
8 is supported on the first frame surface 11. A first height
difference between an end portion of the first frame surface 11
that is connected to the second frame surface 21 and the second
frame surface 21 is smaller than a height difference between the
middle portion of the first frame surface 11 and the second frame
surface 21 (referring to d1 in FIG. 1).
[0055] In the display device of this embodiment, the height
difference between the first frame surface 11 and the second frame
surface 21 of the plastic frame 10 is determined by the injection
molding process of the plastic frame 10. The requirement for the
injection molding of the plastic frame 10 is that, in order to
ensure stability of the injection molding structure, it is required
to steal a material from a position where the material is thicker.
Stealing the material will result in forming a groove structure on
the surface, and the material of the plastic frame 10 cannot be too
thin. In order to solve the corner breakage of the bonding part 8
of the display panel 7 caused by a surface segment difference
structure formed by the injection molding process of the plastic
frame 10, the first height difference between the end portion of
the first frame surface 11 connected to the second frame surface 21
and the second frame surface 21 is configured to be smaller than
the height difference between the middle portion of the first frame
surface 11 and the second frame surface 21, and the first frame
surface 11 below the bonding part 8 of the display panel 7 is
relatively flat so that it is not easy to produce fragments. In
addition, since the first height difference between the first frame
surface 11 at the first end portion and the second frame surface 21
is reduced, a gap h2 (see FIG. 6) between the lower surface of the
bonding part 8 of the display panel 7 and the first frame surface
11 of the first frame is increased relative to a h1 (see FIG. 1) of
the conventional design. That is, a distance between a turning
corner position (i.e., the corner breakage position 9) of the side
at which the bonding part 8 of the display panel 7 is located and
the second frame surface 21 increases, such that the turning corner
position (i.e., the corner breakage position 9) of the side at
which the bonding part 8 of the display panel 7 is located cannot
be in contact with the plastic frame 10, thereby not causing corner
breakage.
[0056] As shown in FIGS. 3A and 3B, in this embodiment, the
material of the plastic frame 10 may be plastic, and the plastic
frame 10 may include four frames supported on a peripheral area on
the back side of the display panel 7, and the four frames enclose a
rectangular frame. The four frames include a first frame 1, a
second frame 2, and a third frame 3 adjacent to the first frame 1,
as well as a fourth frame 4 opposite to the first frame 1. Each of
the frames is provided with a frame surface facing the display
panel 7 and supporting the display panel 7 along a length
direction. The frame surface includes a first frame surface 11 of
the first frame 1, a second frame surface 21 of the second frame 2,
and a third frame surface 112 of the third frame 3. Both end
portions of the first frame surface 11 are adjacent to the second
frame surface 21 and the third frame surface 31, respectively.
[0057] In order to avoid corner breakage occurring on the left and
right corners of the bonding part 8 of the display panel 7, the
second height difference (referring to the first height difference
d2) between the end portion of the first frame surface 11 connected
to the third frame surface and the third frame surface is smaller
than the height difference (referring to d1 in FIG. 1) between the
middle portion of the first frame surface 11 and the third frame
surface.
[0058] As shown in FIG. 6, FIG. 6 is a schematic structural view of
a display device according to an embodiment of the present
disclosure corresponding to a sectional view at A-A position in
FIG. 1. As an example, in order to satisfy for the above-mentioned
height difference, as shown in FIGS. 3A and 4, an end portion of
the first frame surface 11 in contact with the second frame surface
21 is provided as a first inclined surface 112, and a lower end
portion of the first inclined surface 112 is in contact with the
second frame surface 21; and/or, the end portion of the first frame
surface 11 in contact with the third frame surface 31 is provided
as a second inclined surface 113, and a lower end portion of the
second inclined surface 113 is in contact with the third frame
surface. In another embodiment, in order to satisfy for the
above-mentioned height difference, the end portion region of the
first frame surface 11 in contact with the second frame surface 21
may be configured to be a plane having a height lower than the
middle portion of the first frame surface 11, and a step may be
formed between the lower plane and the middle portion of the first
frame surface 11. Similarly, the end portion region of the first
frame surface 11 in contact with the third frame surface may be
configured to be a plane having a height lower than the middle
portion of the first frame surface 11, and a step may be formed
between the lower plane and the middle portion of the first frame
surface 11.
[0059] As shown in FIG. 5, in this embodiment, a portion of the
first frame surface 11 close to both end portions thereof may be
provided as an inclined surface, such as the first inclined surface
112 and the second inclined surface 113. As such, the left and
right corner positions of the display panel 7 cannot contact the
plastic frame 10 when the display panel 7 is pressed by an external
force, so that the corner breakage will not occur on the left and
right corners.
[0060] As shown in FIG. 6, in this embodiment, the first inclined
surface 112 is illustrated as an example. Due to arrangement of the
structure of the first inclined surface 112, the height difference
between the end portion of the first frame surface 11 in contact
with the second frame surface 21 and the second frame surface 21 is
reduced (the height difference is d1 in the related art shown in
FIG. 2, d2<d1 in the present disclosure), such that a supporting
surface of the plastic frame 10 corresponding to the corner
breakage position of the display panel 7 becomes even. The height
of the plastic frame 10 at a corner position on the side at which
the bonding part 8 of the display panel 7 is located (i.e., the
corner breakage position of the display panel 7) is also reduced,
such that a gap distance between the supporting surface of the
plastic frame 10 and the corner breakage position of the display
panel 7 is increased (the gap distance between the corner breakage
position of the display panel 7 and the plastic frame 10 is h1 in
the related art shown in FIG. 2, and the gap is h2 in the
embodiment shown in FIG. 6, because of the arrangement of the first
inclined surface 112 in this embodiment, h2>h1) so that the
corner breakage position of the display panel 7 will not contact
the plastic frame 10 when the display panel 7 is pressed by the
external force F. This greatly reduces the stress concentration
when the display panel 7 is forced and corner breakage is not prone
to occur. Furthermore, the above-mentioned structures of the first
inclined surface 112 and the second inclined surface 113 are easily
formed in the injection molding process of the plastic frame
10.
[0061] In addition, as compared to the plastic frame of the related
structure, the plastic frame 10 in this embodiment does not
increase cost, and an appearance of the display module has no
obvious change in practical application. Among the display device
with the conventional plastic frame structure, the products with
the corner breakage can only be treated as defective products (NG
products) and cannot be repaired. After actual verification, the
display device adopting the plastic frame 10 with the above
structure of this embodiment can greatly reduce the corner breakage
phenomenon and improve the delivery yield of various products.
[0062] As shown in FIG. 5, the inclination angle, length, height,
and other parameters of the first inclined surface 112 and the
second inclined surface 113 may be the same or different.
[0063] Regarding the design of the first inclined surface 112 and
the second inclined surface 113, the first inclined surface 112
will be illustrated as an example, as shown in FIG. 6, in order to
prevent the gap h2 between the display panel 7 and the supporting
surface of the plastic frame 10 from being too large (a gap being
too large easily lets foreign matter in to affect picture quality).
As shown in FIG. 4, the inclination angle .alpha. of the first
inclined surface 112 may be 5.degree.-10.degree., and the length L1
of the first inclined surface 112 in the longitudinal direction of
the first frame surface 11 may be 10-20 mm. The inclination angle
.alpha., and the length L1 may be adjusted within the above range
depending on a model of the display module.
[0064] As shown in FIGS. 6 and 3A, in this embodiment, the height
of the first inclined surface 112 may be greater than the height of
the second frame surface 21; and/or the height of the second
inclined surface 113 may be greater than the height of the third
frame surface. There is a gap between the bonding part 8 and the
first inclined surface 112. Similarly, there is a gap between the
bonding part 8 and the second inclined surface 113. The height
difference between the end portion of the first frame surface 11
adjacent to the second frame surface 21 and the second frame
surface 21 is reduced by providing the first inclined surface 112,
and the height difference between the end portion of the first
frame surface 11 adjacent to the third frame surface and the third
frame surface is reduced by providing the second inclined surface
113 to reduce the height of the supporting surface of the plastic
frame 10 corresponding to the corner breakage position of the
display panel 7, increase the gap, and improve the poor corner
breakage phenomenon of the display panel 7.
[0065] The height difference d2 between the lower end portion of
the first inclined surface 112 and the second frame surface 21 may
be 0.1-0.3 mm, which is set to be 0.2 mm in this embodiment.
Similarly, the height difference between the lower end portion of
the second inclined surface 113 and the third frame surface may be
0.1-0.3 mm, which is set to be 0.2 mm in this embodiment. Through
practical application, it is found that the above-mentioned height
difference range corner breakage is not prone to occur or too large
of a gap is avoided.
[0066] As shown in FIG. 5, the middle portion of the first frame
surface 11 may be provided as a middle plane 111 smoothly
contacting with the first inclined surface 112 or/and the second
inclined surface 113. A rounded corner polishing can be performed
at a connection between the middle plane 111 and the first inclined
surface 112 or/and the second inclined surface 113 to define a
smooth transition and prevent stress concentration points from
forming at the transition position.
[0067] The plastic frame 10 may be an integrated injection molding
structure. As shown in FIG. 7, in the injection molding process,
the plastic frame 10 is formed by a male mold 20 and a female mold
30 which are matched with each other. The plastic frame 10 having
the first inclined surface 112 and the second inclined surface 113
can be formed merely by adding materials of the corresponding
structure at the position of the male mold 20 or the female mold 30
corresponding to the corresponding inclined surface (i.e., the
corresponding position of the mold is provided as the corresponding
inclined surface), and performing R-angle polishing treatment
(surface burr prevention) on the added materials surface.
[0068] As shown in FIG. 6, a buffer 14 may be provided between the
plastic frame 10 and the back side of the display panel 7. The
buffer 14 keeps away from the bonding part 8, that is, an
orthographic projection of the buffer 14 on the display panel 7 is
not overlapped with the bonding part 8. The buffer 14 may be made
of elastic materials, such as foam or the like. When the display
panel 7 is subjected to an external force, the buffer 14
elastically deforms, which can play a role in buffering, damping,
and protecting the display panel 7.
[0069] In the description of embodiments of the present disclosure,
the terms "connect," "fixedly connect," "install," and "assemble"
shall be broadly understood, unless otherwise explicitly specified
and defined, for example, may include a fixed connection, a
detachable connection or an integral connection. The terms
"installation," "connection," and "fixed connection" may refer to a
direct connection, indirect connection through an intermediate
media, or internal communication between two elements. For those of
ordinary skill in the art, the specific meanings of the above terms
in the embodiments of the present disclosure can be understood
depending on specific context.
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